New mercury salt of para-aminophenylarsinic acid.



very valuable for medicinal purposes.

UNITED STATES rarn'r orric.

JULIUS ALTSCHUL, OF BERLIN, GERMANY, ASSIGNOR T0 ACTIEN GESELLSCHAFT FfTR ANILI'N FABRIKATION, 0F BERLIN, GERMANY.

NEW MERCURY SALT 0E PARA-AMINOPHENYLARSINIC ACID.

No Drawing.

Specification of Letters Patent.

Application .filecl April 19, 1909. Serial No. 490,798. (Specimens) Patented Nov. 2, 19%9.

and therefore represents a basic mercury salt of .para aminophenylarsinic acid; it com bines theaction of mercury and of paraaminophenylarsinic acid and is therefore In order to obtain this salt, I add, for instance,

to an aqueous solution of mono-sodium paraaminophenylarsinate a suitable proportion of an alkali and the calculated proportion of a suitable mercury salt.

The followingexa-mple serves to illustrate my invention the parts being by weight. 1

Example: 2.39 parts of the anhydrous sodium sa t of para-aminophenylarsinic acid are dissolved in 10 parts of water and 5 parts of a caustic soda-lye of 8 per cent strength are added. Into this solution while stirring is introduced a solution of 2.71 parts of mercuric chlorid, HgCl in 60 partsof water. It separates a white precipitate which I is drained, washed with water and dried at low temperature,- The product thus obtained when pulverized forms a white powder. which is difiicultly soluble in water, in- .soluble in alcohol and ether, this new salt being decomposed by the action of caustic soda lye with the formation of yellow mercuric oxid. It contains as shown by analysis about 46 per cent. of mercury and about 17 per cent. of arsenic, so that one atom of mercury is associated to one molecule of.

para-aminophenylarsinic acid. It is, theretore, essentially diiferent from the mercury this acid another soluble salt of it may be substituted, as well as another soluble salt.

of mercury for the mercuric chlorid employed above. Having now described my invention and the manner in which the same may be performed, what I claim is:

As anew article ,of manufacture the new mercury salt of paraaminophenylarsinic acid, the compositlon of which corresponds to the formula NH .C H,.AsO,H Hg and which may be obtained by the action of an alkali salt of para-aminophenylarsinic acid on a mercury salt in the presence of. an excess of alkali, which salt'in the dry state when pulverized forms a white powder difficultly soluble in water and insoluble in alcohol and ether, this new salt being decomposed by the action of caustic soda-lye with the formation of yellow mercuric 03nd, which new salt contains'about 46 er cent. of mercury and 17 per cent. of arse iic.

In testimony-whereof I have hereunto set my hand in presence of two subscribing wit- HGSSGS.

J ULIUS ALTSCHUL.

Witnesses HENRY HAS En, WOLDEMAR ;AUPT. 

